B. A and B
Feedback 'All these' in statement A refers to the fundamentalist groups, cash flows, etc. mentioned in the first statement. These should be watched and monitored carefully in order to prevent terrorist attacks. Thus statement A has to follow the first sentence. Statement B which talks about yet another strategy to prevent terrorist attacks follows statement A and precedes the last statement which summarizes the paragraph by saying that these issues (i.e. The issues mentioned in statements A and B) should be addressed with a sense of urgency. Therefore statements A and B make a coherent paragraph with the first and last statements. C can follow the last sentence but not precede it.